APA način citiranja (7. izdanje)
Engberg, J., Jacobsen, A., & Ulrich, J. (2014). In defence of Christianity: Early Christian apologists. Peter Lang GmbH.
Čikaški stil citiranja (17. izdanje)
Engberg, Jakob, Anders-Christian Jacobsen, i Jörg Ulrich. In Defence of Christianity: Early Christian Apologists. Frankfurt am Main, [Germany] ; Bern, [Switzerland]: Peter Lang GmbH, 2014.
MLA način citiranja (9. izdanje)
Engberg, Jakob, et al. In Defence of Christianity: Early Christian Apologists. Peter Lang GmbH, 2014.
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